摘要
提出了液中喷气电火花铣削加工方法,用从旋转的管状电极中喷出的高速气体作为电介质,气体周围的水基工作液辅助冷却和排屑不直接参与放电。以45钢为工件、紫铜为电极进行了材料去除率和加工工件表面质量的工艺实验。结果表明,相对于干式电火花加工,液中喷气电火花铣削加工具有更高的材料去除率和相近的低电极损耗;且随着脉冲能量的减小,工件表面质量逐渐变好。同时对工件表面质量、白层厚度与加工参数的关系进行了分析。
A novel machining method named Submersed Gas-jetting Electrical Discharge Milling is proposed, in which the high-pressure gas blown throughout the inner hole of a rotating tubular electrode worked as the dielectric medium, and water-based liquid around the gas helps cooling and debris evacuation but does not involve in the discharge process. In the experiments, 45 # steel and copper are selected as the workpiece and tool materials respectively. The experimental results indicate that com- pared with the dry EDM, the submersed gas-jetting EDM shows higher material removal rate and similar low tool wear ratio. The surface integrity of the machined workpiece becomes finer along with the decrease of the single pulse discharge energy. Finally, the relationships between the recast layer, surface integrity and machining parameters are analyzed.
出处
《电加工与模具》
2009年第4期6-8,35,共4页
Electromachining & Mould
关键词
电火花铣削
液中喷气
材料去除率
表面质量
electrical discharge milling
submersed gas-jetting
material removal rate
surface integrity
